Shakti Springs Inc. Manufactures Belleville and Corrugated Type Wave Washers. Shakti Springs Inc. Is an ISO 9001 certified company. The Belleville and Corrugated Type Wave Washers are manufactured as per DIN 137. The Wave Washers are of two types: Type A, i.E. Belleville washers preferably for cheese heads screw, round head bolt and nuts. Type B, i.E. Corrugated washers preferably for hex bolts & nuts. Material usage is EN 42 J [C-75]. The Belleville and Corrugated Type Wave Washers are widely used in Auto Industry, Electrical Industries, Electronics, Chemical Industries, Railways, etc.